JPH1014623A - Precious metal-clad material and ornamental article - Google Patents

Abstract

PROBLEM TO BE SOLVED: To bring corners of the second precious metal thin sheets close to each other by a process wherein the first and the second channels are provided on each one side in the width direction of the first face and the second face of the first precious metal thin sheet and the second precious metal thin sheets are respectively arranged in the channels to form a composite and cold rolling and heat treatment are applied on the composite. SOLUTION: A K18 gold thin sheet material is formed and channels 12 are cut and formed on one side being mutually opposite of the surface and the back face. A K18 gold pedestal 10 with edges on the outside of the channels 12 is formed. On the other hand, Pt850 platinum thin sheet clad parts 14 are formed. The Pt850 platinum thin sheet clad parts 14 are respectively fitted in the channels 12 of the K18 gold pedestal 10 to form a composite 16. The composite 16 is rolled and heat-treated. The rolled article is cut to form a belt-like thin sheet clad material. The final rolled product 18 is durable to 180 degree bending processing to form an article in continuous lengths with a U-shaped cross-section. In this shape, when it is seen from one side, the whole article looks as if the whole body is formed of platinum and when it is seen from the opposite side, the whole article looks as if the whole body is formed of gold.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

The present invention relates to a noble metal clad material.

[0002]

2. Description of the Related Art Conventionally, a clad material of a noble metal is produced by heating and pressing a thin plate of gold, platinum, red gold or the like having a thickness of, for example, 1 to 3 mm, forming a clad plate material, and then cutting into small pieces. Was. As described above, many clad materials in which the material layer in the thickness direction is changed to various types are known. However, there has been no clad material in which the material is changed in the thickness direction and also in the width direction.

[0003]

For example, a clad material in which platinum and gold are arranged side by side in the width direction and bonded, and gold and platinum are arranged and bonded in the width direction in reverse, and then bonded together, It can be easily manufactured. However, the method according to this manufacturing method cannot be increased in workability because it is easily peeled.

[0004]

A precious metal clad material according to the present invention is provided with a first groove on one side in the width direction on a first surface of both first precious metal plates, and a second groove of the first precious metal plate. A second groove is provided on the reaction side in the width direction on the surface, and at a central portion of the first noble metal plate, a constant distance is maintained between corners of both grooves, and a thin plate of the second noble metal is provided in the groove. Are arranged to form a composite, and cold rolling and heat treatment are repeated on the composite so that the corners of the second noble metal thin plates disposed in the grooves are close to each other. When the decorative component is formed by bending the clad material, the decorative component has the appearance of only the first noble metal when viewed from one side, and has the appearance of only the second noble metal when viewed from the opposite direction.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to a necklace part, but it is also applicable to a bracelet and the like.

FIG. 1 is a flowchart showing steps of a method for manufacturing a clad material according to the present invention. Melt casting and rolling of K18 gold, width 35mm, thickness 6mm, length 500mm
1.5m depth using a cutting tool
A groove 12 having a width of 8 mm and a width of 8 mm is formed by cutting one side opposite to the other. As a result, a K having an edge 13 outside the groove 12 is formed.
Eighteen stages 10 are formed. On the other hand, Pt850 platinum was melt-cast and rolled to a thickness of 1.5 mm, a width of 8 mm, and a length of 50 mm.
The thin clad portion 14 having a thickness of 0 mm is formed.

[0007] The clad portion 14 of a thin plate of Pt850 platinum is fitted into the groove 12 of the K10 gold base 10 to form a composite 16.
(FIG. 2) is formed. At this time, the groove 13 contains Pt
Before installing the 850 platinum sheet, add 10 μl of silver brazing
m to ensure adhesion to K18 platinum. Then, the composite 16 is clamped by a fixed jig that is uniformly pressed over a length of 30 to 50 cm, and heated by electrothermal heating to form the composite 16.

[0008] The composite 16 is rolled and heat-treated to obtain 0.1%.
Reduce to a thickness of 2 mm. Rolling is 150-160 in diameter
mm, and cold rolling and annealing at 700 ° C. are repeated to form a series of steps. At this time, the pedestal 10 and the clad portion 14 become thinner for each rolling.
Since the silver solder at the bonded portion protrudes due to the rolling, the surface is removed by a thickness of 0.1 mm during or after rolling.

The rolled product is cut to form a strip-shaped thin clad material having a width of 24 mm.

In the above-described embodiment, the portion where the Pt850 platinum thin plate 14 is installed on the K18 thin plate 10 is formed in a grooved shape with an edge. Can be prevented. The edge of the groove may be omitted. In this case, the groove can be easily cut by the cutting tool. However, since the two members have different elongation rates, a long object tends to meander during rolling.

In the above-described embodiment, when a groove is formed in a thin sheet of K18 gold, the existence of the center portion 20 remaining between the corners of the groove 12 is important. That is, in bending the final rolled product, the toughness is ensured by the central portion 20. For this reason, when the thickness of the thin plate 10 is set to 4,
It is preferable that the depth of each of the grooves 12 formed on both the front and rear surfaces is 1 and that the distance in the thickness direction between the corners of the grooves is 2. That is, although the value of x in FIG. 2 is preferably 2, even if the center portion 20 is thinned to about 0.5, the bending can be performed.

The final rolled product 18 in this embodiment has an overall thickness of 0.2 mm, platinum of 0.06 mm and gold of 0.1
The ratio is 4 mm. This final rolled product 18
The edge 13 can be deleted by cutting. The central portion of the final product 18 is close to the corners of the Pt850 platinum layer 14 as shown in FIG. 3, or since this portion is very small, it appears to be substantially touching in appearance.

Therefore, the final rolled product 18 has a rectangular cross-section, and two kinds of noble metal layers are formed in a cross-shaped manner so that the same kind of noble metal is arranged on opposite diagonal directions. Noble metal layers are continuous. In addition, Pt8
The layers of 50 platinum may be slightly separated from each other in the width direction.

The final rolled product 18 can withstand a 180-degree bending process, and can form a long object having a U-shaped cross section as shown in FIG. In this configuration, when viewed from one side, the entire U-shaped member appears to be made of platinum, and when viewed from the opposite side, the entire U-shaped member appears to be made of gold. Even if a hole is formed in one side of the U-shape, what is seen through the hole from one surface side is a noble metal of the same kind as that of the surface.

In the above embodiment, the base 10 was formed of K18 gold, and the cladding 14 was formed of platinum. K18 is Ag
It is considered that the addition of such as can withstand the bending process. On the other hand, when the base 10 and the clad portion 14 are formed of pure Pt or pure Au, the base is made of sticky pure Pt and the fragile pure Au is used.
To the cladding part.

FIGS. 5 and 6 show an example of a necklace manufactured using the clad material according to the present invention. When this necklace is worn around the neck, it looks as if it were made entirely of gold or platinum when viewed from the front, depending on how it is worn.

FIGS. 7 to 14 show several examples of decorative articles using the clad material according to the present invention. In these examples, two overlapping portions are made plane-symmetrical. However, if the clad member of the present invention is used, even if the shape is different, the appearance of only one noble metal is seen from one side, and the opposite side is also seen. From the perspective, only the appearance of the other noble metals is shown. In FIG. 12, a narrow portion at the center is a bent portion.

[0018]

Since the present invention is configured as described above, when viewed from one side, it shows the appearance of one precious metal,
When viewed from the opposite side, a decorative article is obtained which has the appearance of another noble metal.

[Brief description of the drawings]

FIG. 1 is a flowchart showing the steps involved in producing a clad material of the present invention.

FIG. 2 is a perspective view showing a part of a composite showing an example of a thickness ratio in a composite process for producing a clad material of the present invention.

FIG. 3 is a perspective view showing a part of a final rolled product of the clad material of the present invention.

FIG. 4 is a perspective view showing a necklace element in which a clad material of the present invention is formed in a U-shaped cross section.

FIG. 5 is a plan view showing a part of another example of the necklace using the clad material of the present invention.

FIG. 6 is a sectional view showing a longitudinal section of FIG. 5;

FIG. 7 is a plan view showing an example of a necklace component using the clad material of the present invention.

FIG. 8 is a side view of the necklace component of FIG. 7;

FIG. 9 is a side view showing an example of a necklace component using the clad material of the present invention.

FIG. 10 is a plan view corresponding to FIG. 9;

FIG. 11 is a plan view showing a part of a necklace obtained by combining the necklace parts of FIGS. 7 and 8 and the necklace parts of FIGS.

FIG. 12 is a top view of a necklace component using the clad material of the present invention.

FIG. 13 is a side view of the necklace component of FIG.

FIG. 14 is a front view of the necklace component of FIG. 12;

[Explanation of symbols]

 Reference Signs List 10 First noble metal sheet (table) 14 Second noble metal sheet (cladding part) 16 Composite 18 Final rolled product

Claims (3)

[Claims] 1. A first groove is provided on one side in a width direction on a first surface of both first noble metal plates, and a second groove is formed on a width direction reaction side on a second surface of the first noble metal plate. And providing a predetermined distance between the corners of both grooves at the center of the first noble metal plate, and disposing a second noble metal thin plate in the first and second grooves. A composite is formed, and cold rolling and heat treatment are repeated on the composite to form a second composite disposed in the groove.
Noble metal clad material configured such that the corners of the noble metal thin plate are close to each other. 2. A decorative article having a decorative part formed by bending the clad material according to claim 1. 3. A cross-section is formed by a rectangular thin plate, and four layers of two kinds of noble metals are formed so that the same kinds of noble metals are arranged diagonally in the cross-section. Is a precious metal clad material that is continuous.